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公开(公告)号：DK580486D0
公开(公告)日：1986-12-02
申请号：DK580486
申请日：1986-12-02
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
IPC: G06K20060101 , G06K9/62 , G06K
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公开(公告)号：NO861058A
公开(公告)日：1986-09-29
申请号：NO861058
申请日：1986-03-19
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
CPC classification number: G06T3/40 , H04N1/40068
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公开(公告)号：FI861273A0
公开(公告)日：1986-03-25
申请号：FI861273
申请日：1986-03-25
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: An optical and electronic scan produces an image composed of binary value pixels. An automatic picture compression routine reduces the number of pixels in the image. A first stage four to one reduction in the number of pixels is achieved by treating each mutually exclusive four pixel unit as a separate set. A binary value is assigned to each four pixel set. That binary value is assigned to a single pixel in a first output image. The same process is repeated a second time to provide a final output image that has one-sixteenth the number of pixels as has the original input image. The value assigned to each four pixel unit set is a weighted function of the binary value of each of the sixteen pixels in a four pixel by four pixel subfield in which the unit set is centered. The greatest weight is give to the center pixels, that is, to the four pixels of the unit set. Lesser weight is given to the peripheral pixels. Among the peripheral pixels, lesser weight is given to the four corner pixels than is given to the eight side pixels between the corners. In the weighting process, the significance of the binary value of the sixteen pixels in the subfield is in part a function of the total pattern of the pixel values in the subfield.
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公开(公告)号：DK315385A
公开(公告)日：1986-01-13
申请号：DK315385
申请日：1985-07-10
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: A fingerprint image is derived from the direct optical reading of a finger by an optical and electronic scan of the finger with a beam of coherent, collimated light. The beam is shaped in the form of a slit of light which extends the length of the finger zone to be interrogated. That slit light beam is scanned across the finger in a direction perpendicular to the axis of that slit. The rays which constitute the interrogating light in the slit define an incident light beam in the form of a plane which is substantially perpendicular to the surface of the finger being interrogated. The light beam and the rest of the optical system is rotated about an axis that is substantially coincident with the axis of the finger so that this perpendicular relationship between the plane of the interrogating light beam and the surface of the finger is maintained throughout the scan.
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公开(公告)号：DK567185D0
公开(公告)日：1985-12-06
申请号：DK567185
申请日：1985-12-06
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: A gray scale image of a fingerprint composed of a field of pixels is converted to a binary image composed of a field of pixels by a technique which takes into account the directivity of the ridge and valley structure. Three intermediate binary images are developed, one by the use of a vertical filter, one by the use of a horizonal filter and a reference image by the use of a filter which is not directionally biased. Corresponding subfields around each pixel in each of the three images are compared. If the subfield for the vertically derived image is closer to that of the reference image then is the subfield for the horizon- ally derived image, then the binary value for the pixel from the vertically derived image is used in the final image; and vice versa. In this fashion, a fourth a final binary image is derived from a combination of the vertically derived image and horizon- ally derived image which includes the best imagery from each of those two intermediate images.
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Patent Agency Ranking
公开(公告)号：FI854807A0
公开(公告)日：1985-12-04
申请号：FI854807
申请日：1985-12-04
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: A gray scale image of a fingerprint composed of a field of pixels is converted to a binary image composed of a field of pixels by a technique which takes into account the directivity of the ridge and valley structure. Three intermediate binary images are developed, one by the use of a vertical filter, one by the use of a horizonal filter and a reference image by the use of a filter which is not directionally biased. Corresponding subfields around each pixel in each of the three images are compared. If the subfield for the vertically derived image is closer to that of the reference image then is the subfield for the horizon- ally derived image, then the binary value for the pixel from the vertically derived image is used in the final image; and vice versa. In this fashion, a fourth a final binary image is derived from a combination of the vertically derived image and horizon- ally derived image which includes the best imagery from each of those two intermediate images.
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公开(公告)号：ZA842972B
公开(公告)日：1984-12-24
申请号：ZA842972
申请日：1984-04-19
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL , GINSBERG EMILY
IPC: G06T7/00 , A61B20060101 , G06K20060101 , G06K9/00 , G06K , A61B
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公开(公告)号：CA1166445A
公开(公告)日：1984-05-01
申请号：CA375249
申请日：1981-04-10
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: FINGER IDENTIFICATION A finger pressed against a platen provides a fingerprint object which is scanned by an interrogating beam of collimated light in the form of a slit and that is linearly displaced across the platen. As the slit-beam scans across the back surface of the platen, the reflected light beam is modulated. The modulated beam is imaged onto a linear array of photodiodes to provide a series of output signals indicative of modulation information. The outputs of the diodes are serially interrogated at each of successive scan positions to provide a set of signals containing fingerprint information. The platen has a transparent glass base. A layer of transparent, compressible, resilient epoxy is on the back of the glass base. The epoxy layer has a flat back surface. A thin silver reflecting layer on the back surface of the epoxy provides a flat mirrored surface to reflect the light beam. A further epoxy layer on top of the silver provides mechanical filtering. A lacquer layer at the back protects the platen from wear. When a finger is applied to the back surface, the ridges of the finger distort the underlying layers sufficiently so that the reflected light at the ridge zones is scattered while the reflected light at the valley zones is collimated. This difference in scatter is transformed by an imaging lens to a difference in intensity at the diode array.
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公开(公告)号：CA1161250A
公开(公告)日：1984-01-31
申请号：CA375256
申请日：1981-04-10
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
IPC: A61B5/10
Abstract: FINGER IDENTIFICATION A finger pressed against a platen provides a fingerprint object which is scanned by an interrogating beam of collimated light in the form of a slit and that is linearly displaced across the platen. As the slit-beam scans across the back surface of the platen, the reflected light beam is modulated. The modulated beam is imaged onto a linear array of photodiodes to provide a series of output signals indicative of modulation information. The outputs of the diodes are serially interrogated at each of successive scan positions to provide a set of signals containing fingerprint information. The platen has a transparent glass base. A layer of transparent, compressible, resilient epoxy is on the back of the glass base. The epoxy layer has a flat back surface. A thin silver reflecting layer on the back surface of the epoxy provides a flat mirrored surface to reflect the light beam. A further epoxy layer on top of the silver provides mechanical filtering. A lacquer layer at the back protects the platen from wear. When a finger is applied to the back surface, the ridges of the finger distort the underlying layers sufficiently so that the reflected light at the ridge zones is scattered while the reflected light at the valley zones is collimated. This difference in scatter is transformed by an imaging lens to a difference in intensity at the diode array.
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公开(公告)号：NO880371L
公开(公告)日：1988-08-01
申请号：NO880371
申请日：1988-01-28
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL , MARCUS DANIEL H
Abstract: The technique for optically scanning a finger to produce a fingerprint image involves positioning the finger surface to be optically scanned so that it is exposed and, in particular, is not pressed against a platen. A slit light beam along the length of the forward part of the finger is circumferentially rotated (38) about an axis (x-x) about the nominal center of the finger. A reflected slit light beam carries modulation information which is focused on a linear array of photo-electric transducers (12) to provide the fingerprint image. The interrogating light is coherent, substantially collimated, light. The plane of the interrogating slit light beam and the plane of the reflected modulated slit light beam are coplanar thereby establishing an illumination plane (42). The illumination plane is parallel to the axis of the finger and is rotated about that axis during the interrogating scan. The illumination plane is slightly offset (d) from that rotational axis and the incident light (16) in the illumination plane impinges on the finger surface at a slight off-normal axis. This offset and off-normal incidence creates two dimensional shadowing. The finger surface being interrogated is positioned slightly off of the object plane for the downstream focusing optics thereby creating a constructive destructive interference effect at the image plane defined by the transducers.
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